Any Similac users here? Is it better than Nan Optipro?

My LO started with Pre-Nan because she was delivered prematurely (8 months GS age) through c-section. Shifted to Similac Tummicare when she was 3 months old due to bowel irritation and we changed it to Similac Gain as soon as she reached her 6th month mark. I am just wondering which brand of milk would it be best after turning 1 year old? She gained within the normal range, in terms of weight and height. Similac is one of the highest price tags and not going to lie if I say it is better to buy an affordable but with best results. Any suggestions will definitely matter. Thanking you in advance. ☺️